Step-ladder.



J. A. LOPEZ.

STEP LADDER.

APPLiCATION FILED SEPT. 2, 1915.

1,178,084. Patented Apr. 4, 1916.

Eltbmmqg,

THE COLUMBIA PLANOGRAPH Co., WASHINGTON, D. c. I

JOAQUIN A. LOPEZ, OF BANES, CUBA.

STEP-LADDER.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed September 2, 1915. Serial No. 48,704.

To all whom it may concern Be it known that I, JOA UIN A. LOPEZ, acitizen of the Republic of Cuba, residing at Banes, in the Province ofOriente, Republic of Cuba, have invented certain new and usefulImprovements in Step-Ladders; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The present invention is directed to improvements in step ladders, andhas for its object to provide a device of this character which iscapable of being collapsed when not in use, or extended for use.

A further object of the invention is to provide a ladder which isconstructed from light metal so that the same will withstand the hardusage to which it is subjected.

A still further object of the invention is to provide a ladder capableof being used as temporary steps for a building, berths of steamers andcars, gun carriages, or for any other purpose seen fit.

With these and other objects in view, this invention resides in thenovel features of construction, formation, combination and arrangementof parts to be hereinafter more fully described, claimed and illustratedin the accompanying drawing, in which Figure 1 is a side elevation ofthe ladder in its extended position; Fig. 2 is a similar view, showingthe ladder collapsed or folded. Fig. 3 is a top plan view of the ladderin its extended position. Fig. 4 is a sectional view on line 41 of Fig.3. Fig. 5 is a similar view on line 55 of Fig. 8. Fig. 6 is a detailperspective view of the supporting clamp.

The ladder consists of lazy-tong side frames 1, which are obviouslycapable of being extended or folded. The bars 2 of the frames 1 arepivotally connected to the bars 3 thereof by rods at, and rivets 5, saidrods also serving to pivotally support the treads 6 and risers 7. Theends of the rods at are threaded and engaged by clamping nuts 8.

Pivotally connected to the ends of the lowermost bars 2 are uprights 9,uprights 10 being also similarly connected to the uppermost bars 2.Connecting the uprights 9 and 10 are ropes or cables 11, which serve'asbalustrades when the ladder is extended.

It will be noted that the uppermost bars 2 are comparatively long,whereby the same may engage under the support 12, and in this instancebeing shown as a door sill, but it will be of course understood that theladder can be used in connection with other supports.

Mounted on the support 12 are clamps 13, which consist of loops 14:, thearms of which embrace the support. The lower arms of the loops 14 areprovided with curved recesses 15, which are adapted to receive theextended ends 16 of the uppermost rods 4, which are held in saidrecesses by the curved jaws 17 of the plates 18, said plates being.

held in place by the clamping bolts 19, the same being passed throughthe arms of the loops and the support.

From the foregoing description it will be seen that a ladder has beenprovided which can be used for a number of purposes, and further thatthe same can be readily folded when not in use, and extended for use,when desired.

WVhat is claimed is 1. A ladder having collapsible side frames, rodsconnecting the side frames, treads and risers hingedly connected to therods, uprights connected to the upper and lower frames, and flexiblebalustrades connecting the uprights.

2. A ladder having collapsible side frames, rods connecting the sideframes, treads and risers hingedly connected to the rods, one.

of said rods having extended ends, and means carried by a support fordetachably engaging the extended ends of the rods.

In testimony whereof, I affix my signature, in the presence of twowitnesses.

JOAQUIN A. LOPEZ.

WVitnesses:

A. ELLIs, I 1W1. E. HARTLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. G.

